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media: ccs-pll: Add a flag for even PLL multipliers

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Some devices (not entirely CCS compliant) only support even PLL
multipliers. Add support for this through a PLL flag.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
This commit is contained in:
Sakari Ailus
2025-02-14 12:36:18 +02:00
committed by Hans Verkuil
parent 715f84c1e5
commit 2f19528845
2 changed files with 11 additions and 1 deletions
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11
drivers/media/i2c/ccs-pll.c
View File

@@ -124,9 +124,10 @@ static void print_pll(struct device *dev, const struct ccs_pll *pll)
dev_dbg(dev, "pixel rate on CSI-2 bus:\t%u\n",
pll->pixel_rate_csi);
dev_dbg(dev, "flags%s%s%s%s%s%s%s%s%s%s\n",
dev_dbg(dev, "flags%s%s%s%s%s%s%s%s%s%s%s\n",
pll->flags & PLL_FL(OP_PIX_CLOCK_PER_LANE) ? " op-pix-clock-per-lane" : "",
pll->flags & PLL_FL(NO_OP_CLOCKS) ? " no-op-clocks" : "",
pll->flags & PLL_FL(EVEN_PLL_MULTIPLIER) ? " even-pll-multiplier" : "",
pll->flags & PLL_FL(LANE_SPEED_MODEL) ? " lane-speed" : "",
pll->flags & PLL_FL(EXT_IP_PLL_DIVIDER) ?
" ext-ip-pll-divider" : "",
@@ -312,6 +313,10 @@ __ccs_pll_calculate_vt_tree(struct device *dev,
more_mul *= DIV_ROUND_UP(lim_fr->min_pll_multiplier, mul * more_mul);
dev_dbg(dev, "more_mul2: %u\n", more_mul);
if (pll->flags & CCS_PLL_FLAG_EVEN_PLL_MULTIPLIER &&
(mul & 1) && (more_mul & 1))
more_mul <<= 1;
pll_fr->pll_multiplier = mul * more_mul;
if (pll_fr->pll_multiplier > lim_fr->max_pll_multiplier) {
dev_dbg(dev, "pll multiplier %u too high\n",
@@ -668,6 +673,10 @@ ccs_pll_calculate_op(struct device *dev, const struct ccs_pll_limits *lim,
if (!is_one_or_even(i))
i <<= 1;
if (pll->flags & CCS_PLL_FLAG_EVEN_PLL_MULTIPLIER &&
mul & 1 && i & 1)
i <<= 1;
dev_dbg(dev, "final more_mul: %u\n", i);
if (i > more_mul_max) {
dev_dbg(dev, "final more_mul is bad, max %u\n", more_mul_max);

1
drivers/media/i2c/ccs-pll.h
View File

@@ -22,6 +22,7 @@
/* op pix clock is for all lanes in total normally */
#define CCS_PLL_FLAG_OP_PIX_CLOCK_PER_LANE BIT(0)
#define CCS_PLL_FLAG_NO_OP_CLOCKS BIT(1)
#define CCS_PLL_FLAG_EVEN_PLL_MULTIPLIER BIT(3)
/* CCS PLL flags */
#define CCS_PLL_FLAG_LANE_SPEED_MODEL BIT(2)
#define CCS_PLL_FLAG_EXT_IP_PLL_DIVIDER BIT(4)